1x2 - Great Barrier Reef with David Attenborough

In this second episode, David Attenborough continues his exploration of the Great Barrier Reef, aboard the research vessel Alucia. He discovers the creatures that visit the reef every year, from birds to whales, some travelling thousands of kilometres to get there. Using the latest technology, David dives into the shark-infested waters of Osprey Reef in the Triton submersible.